Telephone instrument



H. A. LEISE.

TELEPHONE INSTRUMENT- APPLICATION FILED MAY 21, 1920.

PatenteQ Oct. 25, 19210 TNT OFF! EUBERT A. LEISE, OF MERIDEN,CONNECTICUT.

TELEPHONE INSTRUMENT.

To allwhomitmayco rtcem:

Be it known that I, HUBERT A. LEISE, a citizen of the United States,residing at Meriden, in the county of New Haven and State-ofConnecticut, have invented a new and useful Improvement-in TelephoneInstruments; and I do hereby declare the following, when taken inconnection with the accompanying drawings and the characters ofreference marked thereon, to be a full, clear, and exact description ofthe same, and which said drawings constitute part of this application,and represent, in- I Figure 1, a side view, partly in section, of atelephone receiver constructed in accordance with my invention. I

Fig. 2, an inside view of the receiver-shell detached.

This invention relates to an improvement in telephone instruments andparticularly to telephone receivers and transmitters. In telephonereceivers and transmitters, as at present constructed, the diaphragm isseated upon the edge of a chamber forming a tight air-space whichinterferes with the proper vibration of the diaphragm. The object ofthis invention is to vent this chamber so as to permit the diaprhagm tovibrate freely; and the invention consists in the construction ashereinafterdescribed and particularly recited in' the claim.

Specification of Letters Patent.

- Application filed May 21, 1920. Serial No. 884,722.

Patented ea. 25, rear.

As shown in Fig. 1 of the drawings, I have illustrated my invention asapplied to I a receiver 5 including a metal receiver-shell 6 having aflange 7 which rests upon the edge 8 providing a bearing for thediaphragm 9,

which is held against the shell by the usual ing, a diaphragm-supportingshell mounted therein and formed in its outer edge with a flange andwith a notch opening through said flange, a single disk diaphragmresting upon the said flange and closing the open end of said notch.

In testimony whereof, I have signed this specification in the presenceof two subscriblng witnesses.

HUBERT A. LEISE.

Witnesses:

WILLIAM C. SWEENEY, RICHARD HENRY BoURNE.

